<div class="book-header" id="book-header" role="navigation">
    <a class="btn pull-left js-toolbar-action toggle-summary" href="javascript:;"><i class="fa fa-align-justify"></i></a>
    <a class="btn pull-right js-theme-action theme-action" href="javascript:;"><i class="fa fa-sun-o"></i></a>
</div>